For an initial grain size of 1. 0 μm, the accumulation of damage volume in a ZrO2-dispersed alumina is shown to proceed more slowly than that in a MgO-doped alumina under a given loading condition, irrespective of higher tensile flow stress in the former than in the latter. The slower damage accumulation in the ZrO2-dispersed alumina is caused from the slower formation snd growth of cavities larger than the initial grain size/ Such slower cavitation is also shown to delay the onset of microcracking. The delayed microcracking leads to higher tensile ductility in the ZrO2-doped material than in the MgO-doped one.
|ジャーナル||Materials Science Forum|
|出版ステータス||Published - 1999 1 1|
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering